| "I bought a doughnut, and they gave me a receipt. There is no need for that, man. I'll just give you the money, you give me the doughnut. End of transaction. We do not need to bring ink and paper into this. I cannot imagine a situation in which I would have to prove that I bought a doughnut. Some skeptical friend: 'Hey man! Don't even act like I didn't buy that doughnut! I got the documentation right here...it's in the filing cabinet...under D'" |